增加mqtt

node_modules/mqtt/test/util.js

@@ -1,13 +0,0 @@
-'use strict'
-
-var through = require('through2')
-
-module.exports.testStream = function () {
-  return through(function (buf, enc, cb) {
-    var that = this
-    setImmediate(function () {
-      that.push(buf)
-      cb()
-    })
-  })
-}